Effect of Spartina alterniflora invasion on macrobenthos communities in Rudong's coastal tidal flat,Nantong
In order to explore the ecological impact of Spartina alterniflora invasion on the tidal flat in Rudong County,Nantong City,sediment and macrobenthic community samples were collected from three different habitats(S.alterniflora area,bare mudflat and transition zone)in June and November 2022.The effects of season and habitat on the physicochemical properties of sediments and characteristics such as composition,habitat density,biomass,biodiversity,and community structure of macrobenthic animals were analyzed.The results showed that:1)A total of 26 species belonging to 4 phyla were identified as macrobenthic animals in the study area.In summer,a total of 17 species belonging to 4 phyla were recorded with Littoraria melanostoma,L.scabra,and Glycera chirori being the dominant species in S.alterniflora area,transition zone and bare mudflat respectively;in autumn,a total of 20 species belonging to 3 phyla were recorded with Latericea assiminea,Glauconome chinensis,and Nephtys sp.being the dominant species.2)No significant difference was observed on abundance,biomass and biodiversity of macrobenthic animals between summer and autumn(P＞0.05).3)Although there was no significant difference in abundance or species richness d among three areas(P＞0.05),abundance varied significantly(P＜0.01),with the highest values recorded at the transition zones followed by S.alterniflora area,then bare mudflat.Species diversity H'and evenness J'did not significantly differ between S.alterniflora area and bare mudflat but both exceeded those at transition zone(P＜0.05).4)The ABC curve revealed that the community structure remained stable in bare flat while it changed after S.alterniflora invasion.The invasion significantly altered tidal wetland macrobenthic animal community composition,increasing gastropod class abundance(e.g.,L.scabra and L.melanostoma)while decreasing the abundance and biomass of economically important bivalve class(e.g.,clam).
万方数据
维普
